Air-cleaning device



C. R. SHORT ET AL AIR CLEANING DEVICE Filed Nov. 17l 1919 Patented Julylill?, E23.

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`CHARLFS It. SHORT AND ARTHUR L. CASH, OF DETROIT, MIQHIGAN.

AIR-CLEANING DEVICE Application lled November 17, 1519. Serial No.838,723.

l To all whom img concern.:

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Be it known thatl we, CHARLES R. SHORT and ARTHUR L. CASH, a subject ofthe King of Great Britain, and a citizen of the United States,respectively, and residents of Detroit, county of Wayne and State. ofMichigan, have invented certain new and useful Improvements inAir-Cleaning Devices, of which the following is afull, clear,

concise, and exact description such as will enable others skilled in theart to which the invention relates to make and use the same, referencebeing made thereinto the accompanying drawings, which form a part ofthis specification.

Our invention relates to air cleaning devices designed for use inconnection with internal combustion engines to prevent the entrance ofdust or dirt into the carbureter, and from thence into the workingcylinder ofthe engine;` and particularly to air cleaningedevices nfthelcentrifugal type and in which thepflowof air through the same isunobstructed as bythe use of screens, or by the presence of a body ofwater through which the air flows, as has hereto fore commonly been thecase in air cleaning devices. Such air .cleaning devices are usedextensively with tractors designed for 'use in hauling agriculturalmachinery, in which service the dust present in the air causes abrasionof the pistons and cylinders,y and a rapid wearing out of the engine, ifit is permitted to pass through and into the same.

The object of our invention is to the carbureter rovide an improved aircleaning device of t e centrifugal type which will be simple inconstruction and effective for the purpose of separating dirt from theair which passes through the same and to the carbureter; the

said device having features of construction and operation whereby thedirt is more effectively separated from the air, and a cleaner supply ofair secured for the 'carbureter of the engine, than4 has heretoforecommonly been the case.

Our invention is. illustrated in its preferred form in the drawingvaccompanying and forming a part of this specification;

altho it will bey appreciated that the drawing is for illustrativepurposes only,v

elevation, the same being equipped with our improved airA cleaningdevice.

Figure 2 is a view showing the engine and air cleaning device inelevation, and as seen from a position to the left ofFigure 1. Figure 3is a view showing the lower end of the air cleaning device in sectionand upon a larger scale than in Figure 1. Figure 4 is a view showing avsection upon a transverse plane indicated by the line 1 -4, Figure 3. l

Figure 5 is a view showing a section upon' a transverse plane indicatedby the lines 5 5, Figure 1, and upon a larger scale than in saidfigure.v

Referring to the drawing, reference numeralv 6 designates in aconventional manner an internal combustion -engine of any kind or typeto which combustible mixture is supplied through an inlet manifold 7leading from` av carbureter 8 of any preferred form. The engine as shown1s provided with a fan 9, the purpose-Bf which is Atocause air to flowpast the engine to thereby cool or assist 1n cooling same, as' is usualin internal combustion engine practice, the fan .being driven from Athecrank shaft 10 through a suitable belt 11.

Our improved centrifugal air cleaning device comprises a casing 12 whichis prefelrably of approximately circularv form in ross-section, andwhich casing isshown as arranged in an inclined position with its inletend 13 located adjacent the fan 9, so that the fan will tend to forceair'into the casing under slight pressure. The inlet end of the casin ispreferably provided with a flaring or unnel shaped portion 14surrounding the same, to thereby collect air from the stream of airestablished bythe i 1 ing devices.

Having thus described and explained ur invention, we claim and desire to.secure by Letters Patent: Y

1. In a centrifugal air cleaner, an' elongated casing approximatelycircular in cross-section and having an air inlet opening at one end.'and an air outlet opening of less cross-sectional area than said casingat the other end thereof, and which casing is provided'with aslot'extending longituaiinally and throughout the entire length thereof;.and a spirally arranged member -located within' said casing andextending throughout a. part only of the length thereof, and -whichmember is adapted to impart rotary motion to 'air flowing through saidcasing; said spirally arranged member being located adjacent the inlet.end'-"of`s'ad""dinally and throughout approximately the A casingwhereby an internal chamber is vpro- Yao ` tion located within saidcasing and adapted to impart rotary motion to air flowing. therethrough;an internal chamber locatedvided adjacent the out-let end of saidcasing.

2. In a centrifugal air cleaner,fan elongated casing having an air inletopening at one end thereof, and which casing is provided with a slotextending longitudinally thereof; a spirally 4formed partition locatedwithin said casing'and extending throughout a part only of the lengththereof,

whereby a chamber is-provided within said -casing and beyond the end ofsaid partition and which partition/ is adapted to impart rotary motionto air flowing through said casing; and an air outlet conduit extendinginto the chamber aforesaid at the end of said casing opposite Vsaid airinlet and having an opening through which air may flow, the area of saidair outlet conduit being less than the area of said casing.

3. In a centrifugal air cleaner, an elongated casing lhaving an airinlet opening at one end thereof. and which casing is provided with aslot extending longitudinally thereof; a spirally arranged partiadjacentvthe. outlet end of said casing and an air outlet conduit.v extending-into said chamber an`d spaced apart from the peripheral wall thereofand having an' opening p' 'through which -air may flow lfrom saidchamber, the 'portion 'of said outlet-conduit.

Within said chamberbeing conical 'in form Vand spaced vapartlfrom thewall thereof.

4. In a centrifugal `air cleaner; an elongated casing approximately{circular-1 in cated within said casing and extending.

throughout a part only of the length thereof, rand which member isadapted to impart rotary motion to air flowing through vsaid casing; andan air outlet conduit extending into the end of said casing oppositesaid air inlet and hav'ing'an opening in its side walls through whichair may flow from said easing, said conduit being conical in form VWithin said. casing and the wall thereof being spaced apart from thewall of said casmg. v v

5. In combination in' an internal combustio'n engine having a fan forcausing air yizo-"flow past the same, al centrifugal a1r entire lengththereof; and through which air may flow directly to the surroundingatmosphere and a spirally arran ed member loca-ted within said casing anextending throughoutl a part only of the length thereof, and whichmember is adapted to impart rotary motion tothe airflowing through saidcasing.

6. In combination with a carbureter, air supply means therefor'4includin a conduit in which the air flows in a whir ing stream tothereby separate impurities therefrom, said means including an airconduit having a lateral intake -opening projecting into said airstreamnear the center thereof, and a permanently open communicationbetween the periphery of said stream and the surrounding atmosphere.

7. In combination 'with a carbureter, air supply means thereforincluding a conduit in which theair flo-ws in a whirling stream tothereby separate impurities therefrom, said means, including an airconduit having A a laterally perforated substantiallyconical l'supplymeans therefor including a casing through, which the air advances towardthe carbureter in a whirling stream, said casing being arranged with itsaxis disposed at a considerable'augle to thel vertical, said casing alsohaving a narrow slot along vits underl side in permanently opencommunication with the surrounding atmosphere andY through whichimpurities are discharged by centrifugal action.

cross-section and having an air inletopen- Y 9.` In combination with avcarbureter, air

"supply means therefor including an inclined conduit along which airflows toward the carbureter, means within that portion of the conduitmost remote from the carbureter for directing the air in a spiralcurrent, said means terminating considerably short of thecarbureterisaid conduit having provision for the discharge of impuritieslaterally from the air current by centrifugal action, directly to thesurrounding atmos 5 phere and an axially arranged conduit smaller indiameter than said first named conduit and through which purified airpasses from the` end p'crtion of 'the first named conduit `I1earest thecarbureter to said carhureter. )10

In testimony whereof We aHX our signa-

